Upgrade problem

[dancingqueen74]

sid is the only repo to provide firefox, as bullseye still provides firefox-esr.

Following this guide to ensure that sid packages do not override existing bullseye or mobian packages is sufficient.

Thanks for the guide, which I bookmarked for future reference, but I already uninstalled Firefox. That was the first thing I did when I noticed what happened. There should not be any sid packages left after I uninstalled Firefox and autoremoved unneeded packages, undid the changes in sources.list and removed the pinning. Everything should be OK, but it isn't.